在Rt△ABC中，∠C=90°，AB=3，BC=1，以AC所在直线为轴旋转一周，

书面表达。

     写一写自怎样度过星期天的，开头已给出。60词左右。

     Sunday is my favorite day of the week. On Sundays I usually______________________________

______________________________________________________________________________

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A private agreement between two parties to exchange a series of future cash flows, with at least one of the two series of cash flows determined by a later outcome, is best characterized as a (n) :

A．

B．

C．

离休干部特需经费的主要用途是什么？

患儿，7岁。每晚尿床1次以上，小便清长，面色少华，肢冷畏寒，舌质淡．苔白滑，脉沉细无力。治疗应首选（）

A.补中益气汤

B.菟丝子散

C.龙胆泻肝汤

D.金匮肾气丸

E.导赤散